Malicious PDF — malware analysis report

Static analysis result for SHA-256 45e824232c65358d…

MALICIOUS

PDF

77.3 KB Created: 2021-03-29 15:56:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 322452a531b2dbdc4695c8c0d86754c5 SHA-1: ed56ca65c1e494379ee89d5b6ed7ae76569e30ec SHA-256: 45e824232c65358d1d6d14f27b28903f41455964ba1454ed7078649729438c65
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://seumenha.ru/award?keyword=din+en+iso+iec+17025+pdf PDF link annotation
    • https://basitonivi.weebly.com/uploads/1/3/4/5/134584834/a7d669a4.pdfIn PDF document text
    • https://belexikezetuvom.weebly.com/uploads/1/3/0/7/130775063/potoruxaxaxafim_jotulekamadi.pdfIn PDF document text
    • http://alexsaf.ru/paluzalitatadirunjo8f.pdfIn PDF document text
    • http://begdas.fun/safety_compliance_audit_template72sdn.pdfIn PDF document text
    • https://gavedomosuzutu.weebly.com/uploads/1/3/4/2/134234743/zawupumawe.pdfIn PDF document text
    • https://putojedenavaxo.weebly.com/uploads/1/3/2/6/132683165/japekuxonaf-biwabekibe-namefowefaforek.pdfIn PDF document text
    • http://nelodagavezes.mygamesonline.org/72264408898.pdfIn PDF document text
    • http://mavixepajifulem.scienceontheweb.net/cultural_hegemony_by_antonio_gramsci.pdfIn PDF document text
    • https://zodoxofavuzawa.weebly.com/uploads/1/3/1/4/131437464/e14e552eb95b.pdfIn PDF document text
    • http://wuwisometojone.66ghz.com/sheet_pan_chicken_with_balsamic_vinegar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fozufululuk.rf.gd/personality_test_file.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/vuxabibinezepivijefow.pdfIn PDF document text
    • http://fepaxediv.rf.gd/how_much_do_dustbin_cleaners_get_paid_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/411521930.pdfIn PDF document text
    • https://s3.amazonaws.com/gekojulog/vufak.pdfIn PDF document text
    • http://xibunagevidaze.rf.gd/23551154876.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D5 5048 bytes
SHA-256: 2fc3ec5100f8ed439a933902e9cace9359cff1b80e22c2f47d5640be05c993df
font_01_sfnt_off0000f623.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF623 10568 bytes
SHA-256: 72b52c0f2ae91c751bfa7310366c09a78c313fb6f48ed868c7619e18531783b8
font_02_sfnt_off00011a48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A48 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333